Question

which knowledge is radiometric dating based upon?
○ the weight of the samples
○ the sequence of layers in the rocks
○ the rate of decay for certain isotopes
○ the name of the rocks

Explanation:

Radiometric dating is a method used to date rocks and other objects based on the known decay rate of radioactive isotopes. The principle is that radioactive isotopes decay at a constant rate over time. By measuring the amount of parent isotope (the original radioactive isotope) and daughter isotope (the product of the decay) in a sample, scientists can calculate the age of the sample. The weight of the samples, the sequence of layers in the rocks, and the name of the rocks are not the basis of radiometric dating.

Answer:

the rate of decay for certain isotopes